55402444800 has 864 divisors, whose sum is σ = 212002212240. Its totient is φ = 14332723200.

The previous prime is 55402444777. The next prime is 55402444813. The reversal of 55402444800 is 844420455.

55402444800 is a `hidden beast` number, since 554 + 0 + 24 + 4 + 4 + 80 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (864).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 758937564 + ... + 758937636.

Almost surely, 2^55402444800 is an apocalyptic number.

55402444800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55402444800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106001106120).

55402444800 is an abundant number, since it is smaller than the sum of its proper divisors (156599767440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55402444800 is an equidigital number, since it uses as much as digits as its factorization.

55402444800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 36.

The spelling of 55402444800 in words is "fifty-five billion, four hundred two million, four hundred forty-four thousand, eight hundred".